What we know about the measurement:

AsciLab C6B is a passive bookshelves that cost around 1100 USD for a pair.

  • Quality of the measurement data is high.
  • Origin of the data is AsciLab.
  • Format of the data is generated by a Klippel NFS .
  • Sensitivity: 85.0dB (avg. 100Hz-1kHz for 2.83V estimated at 1m)
  • -3dB (resp. -6db) point v.s. reference is at 54.2Hz (resp. 47.6Hz).
  • Reference level is normalised to 0.0dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 1.6dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-50.0°, 50.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-40.0°, 30.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 6.13 and would be 8.2 with a perfect subwoofer.
      • Details: NBD: ON 0.331, LW 0.285, SP 0.255, PIR 0.235; SM: SP0.912, PIR0.884; LFQ 0.746, LFX 43Hz
    • Tonality (Preference) Score is 6.67 with an EQ and would be 8.52 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.289, LW 0.255, SP 0.237, PIR 0.207; SM: SP0.943, PIR0.939; LFQ 0.746, LFX 38Hz
  • Link to original Review: asr review. Links to other reviews: abi review .
AsciLab C6B
AutomaticEQ (IIR)
Set preamp gain to: -2.7dB.
Type Freq Q Gain
3 44.0 1.16 2.88
3 80.0 1.62 -1.37
3 184.0 1.0 0.77
3 289.0 2.43 -0.61
3 1083.0 3.0 0.48
3 5165.0 2.94 -1.17
3 10341.0 2.71 -1.56
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These EQ optimise the Harman score and is a good start for far field listening like in your living room.

AsciLab C6B filters_auto_eq

AutomaticEQ

AsciLab C6B filters_eq_full

Target v.s. EQ

Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
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